23152661 has 4 divisors (see below), whose sum is σ = 26460192. Its totient is φ = 19845132.

The previous prime is 23152637. The next prime is 23152669. The reversal of 23152661 is 16625132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23152661 is a prime.

It is a super-2 number, since 2×23152661² = 1072091422761842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23152661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23152669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653755 + ... + 1653768.

It is an arithmetic number, because the mean of its divisors is an integer number (6615048).

Almost surely, 2^23152661 is an apocalyptic number.

It is an amenable number.

23152661 is a deficient number, since it is larger than the sum of its proper divisors (3307531).

23152661 is an equidigital number, since it uses as much as digits as its factorization.

23152661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307530.

The product of its digits is 2160, while the sum is 26.

The square root of 23152661 is about 4811.7212097128. The cubic root of 23152661 is about 285.0145103928.

Adding to 23152661 its reverse (16625132), we get a palindrome (39777793).

The spelling of 23152661 in words is "twenty-three million, one hundred fifty-two thousand, six hundred sixty-one".